Need to write only once

Question

Hi I have below code & i want it to write only one using (var yt = new YouTubeService(new BaseClientService.Initializer() { ApiKey = "API Key", })) Thanks

Pankaj Patel · Answer

Hi Ramco Ramco, One of the way is Singleton Design Pattern In C#. Below is one example for reference purpose: using System; // The 'Singleton' class public class API { static API instance; private string ApiKey; private string ApiKeyTime; // Lock synchronization object private static object locker = new object(); // Constructor (protected) protected API() { ApiKey = "API Key"; ApiKeyTime = Convert.ToString(DateTime.Now.ToLongTimeString());; } public static API GetAPI() { // Support multithreaded applications through // 'Double checked locking' pattern which (once // the instance exists) avoids locking each // time the method is invoked if (instance == null) { lock (locker) { if (instance == null) { instance = new API(); } } } return instance; } public string APIKey { get { return ApiKey; } } public string APIKeyTime { get { return ApiKeyTime; } } } public class Stman { public string[] Name = new string[3]; public static void Main() { API api1 = API.GetAPI(); Console.WriteLine(api1.APIKey + " and " + api1.APIKeyTime); System.Threading.Thread.Sleep(2 * 60 * 1000); API api2 = API.GetAPI(); Console.WriteLine(api2.APIKey + " and " + api2.APIKeyTime); } } For more details: C# Singleton https://www.dofactory.com/net/singleton-design-pattern Hope this will help you!